STAMFORD, Conn. -- A 40-year-old Stamford man was sentenced to four years in prison after being found guilty of selling crack cocaine as part of a narcotics trafficking ring, according to a statement from the U.S. attorney.

Terrell Wills will also serve four years of supervised release after his prison term.

Wills was arrested after a six-month investigation spearheaded by the Drug Enforcement Administration and the Stamford Police Department’s Narcotics and Organized Crime Squad.

According to court documents and statements made in court, the investigation revealed that Marvin Wooten, also known as “Smash,” of Norwalk, was operating a significant crack cocaine distribution ring in Fairfield County. Between September 2012 and January 2013, Wooten regularly purchased multi-hundred gram quantities of cocaine from various sources of supply, including individuals who were selling cocaine out of a Bridgeport barbershop. He then converted the cocaine to crack cocaine and distributed it to other dealers and customers.

Wills regularly purchased crack cocaine from Wooten’s associate, Gary England, and then sold the drug to his own customers.

On Sept. 12, 2013, Wills pleaded guilty to one count of possession with the intent to distribute crack cocaine.

Wooten and England also pleaded guilty. On May 22, 2013, Wooten was sentenced to 10 years in prison. England awaits sentencing.

As a result of the investigation, 20 people have been charged in federal court with various offenses related to the distribution of cocaine and crack cocaine in Bridgeport, Norwalk and Stamford.

During the investigation, law enforcement officers seized more than $100,000 in cash, 500 grams of cocaine, 350 grams of crack cocaine, several vehicles and jewelry.

This matter has been investigated by the Drug Enforcement Administration’s Bridgeport High Intensity Drug Trafficking Area Task Force – including the Bridgeport, Stamford, Norwalk, Milford, Westport, and Stratford Police Departments, and the Connecticut State Police – and the Stamford Police Department’s Narcotics and Organized Crime Squad. The U.S. Marshals Service also assisted in the arrests of several of the defendants.